# Brain spa(N3) vs SleepisolBio

The clearest difference is update cadence: SleepisolBio at every 10 days against Brain spa(N3)'s every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Brain spa(N3) ships an update every 6 weeks, SleepisolBio every 10 days. The most recent releases landed on September 26, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Brain spa(N3) | SleepisolBio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Size | 12 MB | 1.1 GB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [N.CER Co., Limited](https://appshunter.io/developer/1537925998) | [leesol](https://appshunter.io/developer/1584929445) |

## What reviewers say

### Brain spa(N3)

[App page](https://appshunter.io/ios/app/brain-span3/id6478898385)

**Features:** macOS Compatibility

**In-app purchases:** none


### SleepisolBio

[App page](https://appshunter.io/ios/app/sleepisolbio/id6739985543)

**In-app purchases:** none


## Frequently asked questions

### Is Brain spa(N3) free?

Brain spa(N3) is free to download, with no in-app purchases.

### Is SleepisolBio free?

SleepisolBio is free to download, with no in-app purchases.

### Do Brain spa(N3) or SleepisolBio have ads?

Neither Brain spa(N3) nor SleepisolBio shows ads.

### Which is updated more often, Brain spa(N3) or SleepisolBio?

Brain spa(N3) ships an update every 6 weeks, and SleepisolBio every 10 days. Most recently, Brain spa(N3) was updated on September 26, 2026 and SleepisolBio on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*